openscans.out

来自「derby database source code.good for you.」· OUT 代码 · 共 86 行

ij> -- minimal testing to verify no scans left open
CREATE FUNCTION ConsistencyChecker() RETURNS VARCHAR(128)
EXTERNAL NAME 'org.apache.derbyTesting.functionTests.util.T_ConsistencyChecker.runConsistencyChecker'
LANGUAGE JAVA PARAMETER STYLE JAVA;
0 rows inserted/updated/deleted
ij> autocommit off;
ij> autocommit off;
ij> create table t1(c1 int, c2 int);
0 rows inserted/updated/deleted
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> insert into t1 values (1, 1);
1 row inserted/updated/deleted
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> create index i1 on t1(c1);
0 rows inserted/updated/deleted
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> create index i2 on t1(c2);
0 rows inserted/updated/deleted
ij> insert into t1 values (2, 2);
1 row inserted/updated/deleted
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> -- scan heap
select * from t1;
C1         |C2         
-----------------------
1          |1          
2          |2          
ij> -- scan covering index
select c1 from t1;
C1         
-----------
1          
2          
ij> -- index to base row
select * from t1;
C1         |C2         
-----------------------
1          |1          
2          |2          
ij> select * from t1 where c1 = 1;
C1         |C2         
-----------------------
1          |1          
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> commit;
ij> -- test cursor which doesn't get drained
get cursor c1 as 'select c1 + c2 from t1 order by 1';
ij> next c1;
1          
-----------
2          
ij> close c1;
ij> -- do consistency check on scans, etc.
values ConsistencyChecker();
1                                                                                                                               
--------------------------------------------------------------------------------------------------------------------------------
No open scans, etc.
2 dependencies found                                                                                        
ij> commit;
ij>